Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Goblin Bombardment + Pyreheart Wolf

Decks

How it works

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Activate Goblin Bombardment by sacrificing Pyreheart Wolf
When Pyreheart Wolf dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
Resolve the Goblin Bombardment ability.
Activate Goblin Bombardment by sacrificing Pyreheart Wolf
When Pyreheart Wolf dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
Pyreheart Wolf enters and dies as a state-based action due to having 0 toughness. Its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
Resolve the Goblin Bombardment ability from step 4.
Repeat from step 4.

In which brackets is this combo allowed, per Spellbook's Spicy tier?

1–2 · Exhibition & Core

Spellbook classifies this as Spicy — not for these brackets.

3 · Upgraded

Allowed in this bracket.

4–5 · Optimized & cEDH

All combos are allowed.